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(Lifting N Tx @ Sep. 20 2006,10:54)</div><div id="QUOTEHEAD">QUOTE</div><div id="QUOTE">This is interesting stuff, which raises a question or three.
I've assumed that the biggest difference between competitive bodybuilders and competitive lifters is that typical competitive bodybuilding routines (when steroid aided) build a lot more sarcoplasmic hypertrophy vs. more sarcomere hypertrophy for the lifters. Dan's article makes that seem unlikely, unless there is a big difference in relative amounts of type I v type II development.
Yes, bodybuilders are strong, and yes, lifters have big muscles. However, there are certainly lifters who are stronger than, say, Ronnie Coleman, but have significantly smaller muscles. If the difference is not in the amount of sarcoplasmic v sarcomere hypertrophy, are we to conclude that it's in relative amounts of type I v type II hypertrophy? If not that, then I have to conclude that Ronnie should be stronger, not weaker. If the strength differential is all CNS, then to be a champion lifter (ignoring weight class limits) one should train as a bodybuilder, and get as big as possible. Then, just try to maintain size while switching to more frequent low rep heavy work to develop CNS efficiency.</div>
Also keep in mind that there is a large difference in work betwen the two extremes.
Weightlifters generally use heavier load but less total work, whereas BB use somewhat lighter loads but much greater volumes of great.
When trying to equate the work done the problem is fatigue, IE it's much harder to get in the same workload with your 3RM than your 10.
As far as fiber types there is a mixed bag depending on muscle examined but for the most part we are all about 50/50, some may be 60/40 II/1 or the opposite but we all generally fall into the realm of 50/50.
Which is why training for a specific type is ridiculous to me at least, other may disagree. If working within a load that recruits all fibers the bigger difference would be fatigue rate of the MUs themselves, IE higher fatigue rate MUs would have a higher degree of rotation therefore their total time under tension would not be as great. THis could be one reason why type 1, although harder to hypertrophy, is the preferential type that is hypertrophied during typical BB routines IE many sets, longer total tension time on the types 1 because they can handle longer tension before fatigue.
So we get back to what would cause a longer tension time on the type II, naturally the load would need to be heavy enough to recruit them, secondly we would need to extend the tension time that these MUs recieve, IE fatigue managment.